Features Aluminum Alloy Seals - Aluminum alloy seals, built by accumulation, effectively prevent oxidation and rust USB Monitor - Using the USB monitor, the status during charging is clear and the numbers are clearly visible Rustproof - Built-in aluminum alloy plate is used repeatedly to prevent friction and rust Easy to Carry - Small size, easy to carry and store, easy to use and with good practicality QUALITY SERVICE -- Our goal is to serve our customers wholeheartedly. If you have any questions, please feel free to contact us, we will reply you within 24 hours! Specification: Item Type: USB Type C Tester Optional Style: Black, White Click the button to view the charging data recorded in groups 1 to 9 Press and hold the button for 3 seconds to erase the charging data recorded in a single group Current: 0-5.1A. Duration: 0-99hours Mah:099999mAh. Group: Group 0-9 Voltage: 4-30 V. Power: 0-155 W. Internal temperature: 0-80 degrees Package list: 1 x tester1 x user manual in Chinese and English Package List 1 x Tester